I have tested on many versions of the ps3 slim, 1.13 HABIB CFW is very good, and I try to install CFW 4.46 LDZ FERROX by ALEXANDER, if I run the game and get a home brew pause screen freezes and says update error, but no problem downgrade from CFW 4:46 - 3:55 in the CFW system recovery using REBUG_3.55.3_REX_PS3UPDAT.PUP made ​​it back to v.3.55 thank you.

That can happen when you run a version of Multiman that was not compatible with the firmware first. e.g CFW 4.46, multiman disables bdrom, so if you had then updated to the latest compatible Multiman, it would have still been disabled, thats when you re-enable it.